Tripp



(No ModeL)" I G. W. TRIPP.

ADJUSTABLE STOOL QR GHAIR. v N 1. Patented Apr. 1 7 ,1888-.I

f INVENTOBJ. 5

N. PETERS. PIwto-lmwgmvhur. Wflllinglo'n. D. Q I

UNITED I STATES PATENT- OFFIcE; 1

GEORGEWASHINGTON TRIPP, or AUBURN, NEWQYORK.

ADJUSTABLE 'sr ooL, 0 CHAIIR.

SPECIFICATION forming part of Letters Patent No. 381,188, dated April'l7, 1888'. g r

Application filed December 29, 1857. Serial No. 259,288. (No modeLi' To all whom it may concern.-

Be it known that 1, GEORGE WAsHrNcroN TRIPP, of Auburn, in the county of Cayuga, in theState of New York, have invented newand useful Improvements in Adjustable Stools or Chairs, of whichthe following, taken in connection with the accompanying drawings,

the desired height. I

' sponding parts.

-formly in its various positions.

Theinvention consists in an improved construction and combination'of parts which afford maximum range of adj ustment ofthe elevation of the seat and facilitate said adjustment, and also counterbalance the seat uni- The invention isfully illustrated i the annexed drawings, in whichv Figures 1 and2 are verticaltransverse sections of my improved stool, taken in planes at right angles to each other. Fig. 3 is a horizontal transverse section on line as, Fig. 1. Fig. 4 is an enlarged detached perspective view of the bearing-block on which the seatspindle isstepped; and Fig. v5 is a transverse section on line 3/ Fig. 4.

Similar letters of reference indicate corre- A represents the tubular standard, to which is removably attached acap, 0, which isproing cylindrical guide, a, the upper part of the standard, and respect vided with a rigid'cen'tral downward-project- From the interior of ively from diametrically-opposite sides thereof, project ears 0 c, on which are pivoted sheavescc. lnside of the standard is arranged-to slide vertically a weight, D, which is formed with a vertical passage, (7, through its center, for the purpose hereinafter exjecting flanges f f at opposite sides of the cord or chain. The top of this block is provided with a socket,'u, in which is stepped the vertical position.

spindle 7;,carrying the seats in theusual manner, and said spindle, extending through I the vertical g'uidea. is thereby sustained in its The weight D overbalances the seat and its spindle, and thusthe seat is normally sustained at its extreme. elevated position,and can only'be lowered or depressed by a weight applied to the top of the seat.

In order-to allow the seat to be confined at different elevations, I provide "the spindle h with aseries of circumferential grooves, hh,

arranged at intervals of its length, and to the' upper part of the standard A, I pivot a latch,

t, at one of its ends, and 'form the opposite end thereof with a nose or projection adapted:- to engage that part of the aforesaid grooves,

which is brought opposite the said catch. A. 1 f

spring, j, back of the catch, presses the same toward the spindle h. The catch is formed in 'one piece with a handle, i, by which tomanipulate it. In order. to facilitate the operation of the catch, I pivot to the base oftbe standard A a foot-lever, Z, and connect the lat-' ter with the catch t by a rod, 2;, as shown in Fig. 2 of the drawings. The said foot-lever allows the occupant of the stool to adj ustthe seat to the desired elevation by simply depressing the lever bythe foot and either reflieving the seat from the weight of the cow pant, and thereby allowing the weight D to raise the seat, or applyingthe weight of the occupant to the seat, and thereby depressing the. same, as may be desired.

The central channel extending through the bottom of the standard A and the passage d extending completely'through the weight D.

allow the lower end of the spindle'to-pass through said parts,and thus the range of the adjustment of the seat is greatly-augmented.

Ilhe circumferential grooves hh while serving as a rack for the engagement of the catch 6, allow at the same time free rotary movement .of the seat. v

It is obvious that the singlecord orichain 6 may be divided at the center of its length, and

the adjacent ends of the twos'eparate cords or) chains thus obtained are then to be tied to the bearing-block f. r V.

Having described my invention,whatI claim as new, and desire to secure by Letters Patent,

rying the seat and stepped on the said bearjug-block, and a catch adapted to engage said spindle and confine the same in its adjusted position, as set forth.

2. The combination of the tubular standard A, cap 0, provided with the cylindrical guide a, sheaves c c, pivoted to the interior of the standard, the weight D, formed with the central passage, d, the cord or chain 6, running over the sheaves and connected at opposite ends to the aforesaid weight, the bearingblock f, mounted on the central portion of the cord or chain, the spindle h, sliding in the guide a and stepped on the bearing-block f, and provided with circumferential grooves h, a catch connected to the standard and adapted to engage either of the aforesaid grooves, and the seat S, secured to the spindle, substantially as described and shown.

In testimony whereof I have hereunto signed my name, in the presence of two witnesses, at the city of Auburn, in the county of Cayuga, in the State of New York, this 26th day of De- October, 1887.

I GEORGE WASHINGTON TRIPP. [L. s.]

Witnesses:

JAMEs LYON, A. H. SEARING. 

